Name: gm110360 Date: 10/17/2001


/usr/jdk1.2.2_05/bin: ./java -version
java version "1.2.2"
Solaris VM (build Solaris_JDK_1.2.2_05, native threads, sunwjit)

The SDK tool documentation for the Java application launcher states (in the JIT
section) that "the default behavior of the launcher is to execute bytecodes
using a Just-in-Time compiler, or JIT. The default compiler is located at
jre/lib/sparc/libsunwjit.so".

However the JDK/JRE 1.2.2 distributions do not include that file in that
directory. Either the documentation is wrong, or the distributions are
incomplete.

The output of "java -version" indicates that the launcher uses the sunwjit by
default. But the SDK tool documentation states (in the JIT section) that "if
no such compiler is found, the virtual machine will default to using the
interpreter".

So, if the libsunwjit.so file is not found in jre/lib/sparc, does the VM
default to interpreting bytecodes? Or is the SUNW JIT compiler code located in
some other .so file, contrary to the documentation?

We would like to ensure that we are using a JIT, in avail ourselves of the
advertised performance benefits of doing so (from the tool
documentation: "Using a JIT causes a slight delay after each class load, but
can improve overall program performance. In some cases, execution time will
improve by a factor of ten.")
(Review ID: 133943)
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